Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 6, Issue 6, Pages 1949-1955Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ee40190a
Keywords
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Funding
- WCU program through the Korea Science and Engineering Foundation
- Ministry of Education, Science and Technology [R31-2008-000-20012-0, R31-2008-000-20004-0]
- National Research Foundation of Korea [2009-0093020, 2012R1A1A2005855]
- Korea Institute of Energy Research [GP2012-0024-01]
- Korea Research Council for Industrial Science Technology
- National Research Foundation of Korea [2012R1A1A2005855, R31-2012-000-20012-0, 2009-0092785] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Highly efficient ITO-free polymeric electronic devices were successfully demonstrated by replacement of the ITO electrode with a solution-processed PEDOT:PSS electrode containing Ag nanoparticles (NPs). Polymer solar cells (PSCs) and light emitting diodes (PLEDs) were fabricated based on poly(5,6-bis(octyloxy)-4-(thiophen-2-yl)benzo[c][1,2,5]thiadiazole) (PTBT): PC61BM and Super Yellow as a photoactive layer, respectively. The surface plasmon resonance (SPR) effect and improved electrical conductivity by the Ag NPs clearly contributed to increments in light absorption/emission in the active layer as well as the conductivity of the PEDOT: PSS electrode in PSCs and PLEDs. The ITO-free bulk heterojunction PSCs showed a 1% absolute enhancement in the power conversion efficiency (3.27 to 4.31%), and the power efficiency of the PLEDs was improved by 124% (3.75 to 8.4 lm W-1) compared to the reference devices without Ag NPs. The solution-processable conducting polymer, PEDOT: PSS with Ag NPs, can be a promising electrode for large area and flexible optoelectronic devices with a low-cost fabrication process.
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